I've stumbled across a few and checked them out, out of curiosity. In the interest of safety and good taste I will not grant them advertisement by naming them here.
Now, I'm not saying this applies to ALL vendors not associated with ECF, but in my experience those who aren't on this forum are typically engaged in one or more questionable practices like spouting unfounded medical claims, offering dangerously high nicotine level
juice, and I've seen at least one case of thinly veiled drug references and what they called, "experimental
juice, for experimenting". In other words, stuff that puts the entire
vaping community's safety and image at risk. ECF Suppliers are held to a higher standard they must agree to in order to be here. I'm sure there are many "good" vendors out there who
aren't here yet, but I can be confident in the integrity of all those vendors who
are here. For me, ECF is kind of like the Good Housekeeping Seal. Because of this higher standard I have no qualms recommending ECF to anyone who wants to know more.